❓ คำถาม According to the passage, what distinguishes a true keystone species from a dominant species?
- A. A keystone species has a high biomass and is usually a top predator.
- B. A keystone species has a large impact on its ecosystem despite relatively low abundance.
- C. A dominant species always provides critical resources for other organisms.
- D. A dominant species is more likely to be affected by environmental changes.